Fountain pen



April 26, 1927.

M. MACH FOUNTAIN PEN Filed June20, 1925 nvcuto'o Mama 11. M4 cw.

V 9 Ronny .9 ill? Patented Apr. 26, 1927.

UNITED STAT MILTON M. MACH, OF OMAHA, NEBRASKA.

FOUNTAIN PEN.

Application filed June 20, 1925.

My invention relate; to fi'iuntain pens, and it is the object thereof to provide a fountain pen with which the user may employ at will either of two co-lorsor qualities of ink, thereby facilitating the writing of any matter, such as book-keeping entries, wherein it is desirable that portions be written with ink ,of a different character from that used for the other portions of the writing. A further object of my invention is to provide a fountainpen havinga body or barrel of such form that asecond or auxiliary pen-barrel may be slidably connected therewith for longitudinal movement relative thereto; to pro vide means for limiting the relative longitudinal movement of the auxiliary barrel; and to provide means by which a removable cap or guard may be applied to protect both pens when the same are not in use, and said cap or guard carried upon the main barrel when either pen is in use.

A structure embodying my invention is illustrated in the accompanying drawings, in which Fig. 1 is a side view of the pen in normal position, the cap .or' guard being in longitudinal section, Fig. 2 is an end view of the holders and: nibs, Fig. 8 is a transverse section on the line 3-3 of Fig. 1, Fig. t is a side view showing the auxiliary pen in operative position, Fig. 5 is an end view of the head of the main pen-barrel, and Fig. 6 is a detail longitudinal section on the line 66 of Fig. 3.

Tn carrying out my invention according to the illustrated embodiment thereof, I provide a fountain pen having a hollow body or barrel 7 of semicylindrical form, which may be of molded vulcanite or any suitable material ordinarily used in pens of this class. At the edges of the flat side of the barrel 7 are metal guide-strips 8, substantially U shaped in transverse section, but with one flange or leg slightly shorter than the other. The guide-strips are permanently attached to the barrel, preferably during the molding of the latter, and, to afford a secure connection between the plastic material and the strips, the latter may have a plurality of integral tongues 9 turned inwardly therefrom and embedded in the vulcanite, which may form a further attachment by extending into the openings 10 from which the tongues are displaced, as indicated in Fig. 6. The barrel 11 of the second or auxiliary pen is of semi-cylindrical transverse sectional form, similar to the barrel 7, and is pro- Serial No. 88,546.

vided atthe edges of the flat side with guide strips 12 of the same sectional form as. the strips 8 but disposed reversely thereto, so that the exposed flanges of each'pair of strips may slid-ably intercngage, as best shown in Fig; 3. The strips12mayhave tongues 18 turned in therefrom, similarly to the tongues 9 ofthe strips 8, as shown. in

Fig. (3. Near the lower or open ends Ofihe,

barrels 7 and 11, the same have taperedportions let Wl1lCl1,'Wl1el1lD the normaltransvereely registering position shown in-Fig. 1, comprise a frusto-conical seat adaptedtobe frictionally engaged by theguard or cap 15. The cap may have the usual-clip 16 at the side thereof for retaining the pen in the pocket. Secured to the upper or closed end of the barrel 7 is a 'frusto-conical head 17 of which the tapering outer surface is symmetrical with the cap-seat formed ,by the portions 14 of the barrels, whereby the cap may be frict-iona'lly engaged with said head 17, as indicated in Fig. l, when the pen is vin use. The head 17 is detachably connected with the barrel by suitable. means, such as the screws 18. The head forms a stop for limiting in one direction the longitudinal sliding of the barrel 11, of which the upper end engages the head as shown in Fig. 1, when the barrels are in their normal. rela tion, with the portions 14 in register. On the barrel 7 the guide-strips 8 extendffrom the upper end to a point near the tapering seat 14, while the strips 12 on the barrel 11 are shorter, so that said barrel 11 may slide longitudinally to a position such as shown in Fig. l, the movement being stopped when the lower ends of the strips 12 come to the lower ends of the strips 8. The barrels 7 and 11 may be separated by first removing the head 17 and then sliding the guidestrips 12 of the auxiliary barrel off the upper ends of the guide-strips 8 of the main barrel, and when the parts are assembled the head prevents separation of the barrels.

The main barrel 7 carries at the lower end thereof the holder 19 having an extended oval neck 20, from the end of which the nib 21 and retainer 22 project in the usual manner. The holder 23 carried by the auxiliary barrel 11 is provided directly with a socket for the nib 24 and retainer 25, so that in the normal position of the barrels the main nib 21 extends beyond the auxiliary nib 24 a distance corresponding with the length of the neck 20, as represented in Fig. 1.

lit

The ink reservoirs of both the main and auxiliary pens may be of any suitable character, as the specific internal structure of the barrels is not a part of my invention. If self-filling reservoirs are employed, each barrel is provided at one side with a fillinglever 26, as indicated in the drawings.

It will be seen that when the barrels are in the normal relation, the main pen may be used after merely removing the cap 15, and said main pen would usually be employed for the kind or color of ink most frequently used. When inscriptions are to be made with the auxiliary pen, the same is placed in the operative position shown in Fig. 4, by sliding the auxiliary barrel downwardly, the movement being effected by the writer pushing upon the auxiliary barrel with his forefinger, which rests thereon when the pen is held in the usual writing position. A re verse movement of the forefinger retracts the auxiliary barrelto the normal position, when use of the main pen is to be resumed, or when the cap is to be replaced upon the seat 14: and the pen returned to the pocket. While the pen is in use the cap is placed upon the head 17, as before noted.

Now, having described my invention, what I claim and desire to secure by Letters Patent is:

1. In a fountain pen, a main pen-barrel having longitudinal guide members, an auxiliary pen-barrel connected slidably with said guide members, said main and auxiliary barrels having portions adapted to register transversely to form a tapering seat, and a cap frictionally engageable with said tapering seat to cover the ends of both barrels.

2. In a fountain pen, a barrel divided longitudinally into members whose combined transverse section is substantially circular, means connecting said members for relative longitudinal sliding movement, and means on one of said members for limiting the longitudinal movement of the other relative thereto in one direction.

3. In a fountain pen, a main barrel having longitudinal guide members, an auxiliary barrel connected slidably with said guide members, said barrels having portions normally registering transversely to form a seat for a cap, a cap engageable with said seat to cover the ends of both barrels, and 11V head carried at the opposite end of the main barrel and adaptedto receive said cap, said head forming a stop for limiting the longitudinal movement of the auxiliary barrel in one direction and alining the seat-forming portions of the barrels.

4. In a fountain pen, main and auxiliary barrels slidably connected for relative longitudinal movement, means on the main barrel for limiting the relative movement of the auxiliary barrel in one direction, a holder and pen-nib for each barrel, the holder of the mainbarrel having an extended neck portion, tapering portions on the barrels normally registering to form a seat for a cap, a cap engageable with said seat tocover the holders and nibs, and a head carried at the opposite end of the main barrel and having an integral seat for receiving and retaining the cap.

5. In a fountain pen, a main barrel having longitudinal guide members, an auxiliary barrel connected slidably with said guide members, a holder carried by each barrel, a pen-nib carried by each holder, and means on the main barrel for stopping the relative longitudinal movement of the auxiliary barrel in one direction at extreme posi tion in which the pen-nibs are oppositely spaced apart longitudinally.

MILTON M. MACH. 

